Hi there, Ive used noch puffer grass on my model railway for weeds and short grass on a derelict site, apply wood glue where you want it, then used the puffer bottle to apply it, vacuum away whats left over, then run a magnet over it for it to stand up

what I use for longer rough grass, for things like railway embankments is car soundproofing,from older cars. teased (to get rid of the long braided bits) and stuck into a layer of woodglue in clumps, when dry tease it out with a wire brush then painted with water colours, sap green is the best colour I think, theres a section on my website showing how I built it,

http://michael-delamar.fotoblog.co.uk/any questions just ask, my main hobby is model railways,been a member of my local model railway club for over 10 years, and exhibit layouts weve built all over the country.
I registered to this site for some model boat item advice, the guys here have been very helpfull, dont know much about model boats, but anything you wanna know about model railways dont be afraid to ask
cheers
Mike